Installing Windows XP Service Pack 3 sends some PCs into an endless series of reboots, according to posts to a Microsoft support forum. Jesper Johansson, a former program manager for security policy at Microsoft Corp. and a prominent Windows blogger, has worked with users to tentatively identify the problem as involving only machines using processors from Advanced Micro Devices Inc.

Messages from frustrated users began accumulating on the XP SP3 support newsgroup Wednesday, just a day after Microsoft released the update to the general public. "I just installed Windows XP SP3 and after completing the processes and when the system reboots, the system cannot proceed to load the Windows," said a user identified as "Olin" in a message that kicked off a long thread. "It just displays the flash screen of Windows then after it reboots again."

Most users who left messages on the forum said that they were unable to boot into Windows Safe mode — a last-ditch way to sidestep the normal boot process for troubleshooting purposes — or revert to a previously saved System Restore point. Some were understandably upset. "Way to go, Microsoft, releasing the pile of dung called SP3 that hoses your system so bad even Safe Mode isn't working!" said a user identified as Mike Voss. "Props to your QA guys, they certainly have done their job."

Update: There is a workaround available on Jesper Johansson's blog.

You can read the entire article at Computer World.